The ones in plastic pots just receently came to my home and will be repotted into terracotta soon – the one in the terracotta pot started my slight obsession about a month ago. I got it from my local garden center, the others were bought online.
From left to right, Crassula arborescens, Crassula ovata minor (or minima), Crassula ovata, Crassula ovata Horn Tree
by Two-toed_Being